Allow PNaCl NMF to set translator optimization options for experimentation.

ppapi/native_client/src/trusted/plugin/pnacl_options.h

+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_PNACL_OPTIONS_H_
+#define NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_PNACL_OPTIONS_H_
+
+#include <vector>
+
+#include "native_client/src/include/nacl_string.h"
+#include "native_client/src/include/portability.h"
+
+namespace plugin {
+
+// Options for PNaCl translation.
+class PnaclOptions {
+
+ public:
+  PnaclOptions();
+  ~PnaclOptions();
+
+  // Return true if we know the hash of the bitcode, for caching.
+  bool HasCacheKey() { return bitcode_hash_ != ""; }
+
+  // Return the cache key (which takes into account the bitcode hash,
+  // as well as the commandline options).
+  nacl::string GetCacheKey();
+
+  // Return true if the manifest did not specify any special options
+  // (just using the default).
+  bool HasDefaultOpts() {
+    return opt_level_ == -1 && experimental_flags_ == "";
+  }
+
+  // Return a character array of \x00 delimited commandline options.
+  std::vector<char> GetOptCommandline();
+
+  bool translate() { return translate_; }
+  void set_translate(bool t) { translate_ = t; }
+
+  uint8_t opt_level() { return opt_level_; }
+  void set_opt_level(int8_t l);
+
+  nacl::string experimental_flags() {
+    return experimental_flags_;
+  }
+  void set_experimental_flags(const nacl::string& f) {
+    experimental_flags_ = f;
+  }
+
+  void set_bitcode_hash(const nacl::string& c) {
+    bitcode_hash_ = c;
+  }
+
+ private:
+  // NOTE: There are users of this class that use the copy constructor.
+  // Currently the default copy constructor is good enough, but
+  // double-check that it is the case when more fields are added.
+  bool translate_;
+  int8_t opt_level_;
+  nacl::string experimental_flags_;
+  nacl::string bitcode_hash_;
+};
+
+}  // namespace plugin;
+#endif  // NATIVE_CLIENT_SRC_TRUSTED_PLUGIN_PNACL_OPTIONS_H_